Welcome, Guest. Please login or register.
April 20, 2018, 10:44:59 am

Login with username, password and session length
TRADER Feedback System
IS NOW AVAILABLE
* SBFTECH Membership Required *
435157 Posts in 37249 Topics by 9534 Members
Latest Member: 88_GT
Search: Advanced search
Advertiser Inquiries
+ SBFTECH.com Experienced Small Block Ford Tech
|-+ Membership Tech
| |-+ DIY'er Tricks of the Trade
| | |-+ Effects of a Camshaft Too Advanced - Ranger 2.3L Case
0 Members and 1 Guest are viewing this topic. « previous next »
Pages: [1] Go Down Print
Author Topic: Effects of a Camshaft Too Advanced - Ranger 2.3L Case  (Read 11755 times)
Joel5.0
El Hombre
Administrator
Big Block
*****
Offline Offline

Posts: 22510


Location: Puerto Rico
Miracles?.... by appointment only!


« on: May 23, 2014, 04:23:13 pm »

    During the time I've been earning my "bread and butter" in the automotive diagnostics/repair world, I've had the chance to gather a good database of "WTF?" cases. The following was a 1996 Mazda B2300 (aka Ford Ranger w/2.3L 8-spark plugs engine) that went trough two shops previous to mine. The following is a description of the problem/symptom that even though it was on a I4 2.3L engine, does carry a lot of hints or "telltale" signs for any type of engine regardless of its application (DD, Street & Strip, Racing).

Patient:
  • 1996 Mazda B2300 P/Up with 2.3L engine

Symptoms and Test Results:
  • Gross lack of power. It required the gas pedal to be held to the floor just to move/climb the entrance to the shop.
  • Idle control was intermittent.
  • Only OBD-II failure code showing was P0300 (Multiple/Random Cylinders Misfire) with misfire count above 10k engine idling for each cylinder.
  • Spark Advance, Long Term and Short Term values were withing acceptable range and did not show anything out of the ordinary.
  • ECT, IAT and MAF voltage values were also within range.
  • Injectors pulse width was within specification as well.
  • Fuel pressure was within its 30-45 psi spec.
  • Engine under WOT conditions in neutral did not accelerate and "stalled" @4,000 RPM.
  • Cranking Compression results:
    • #1. 185 psi
    • #2. 190 psi
    • #3. 195 psi
    • #4. 195 psi
  • Above results are too high for this OEM 9.2:1 SCR engine.

History:
  • This little pickup went through two (2) shops trying to get the problem solved.
  • Timing belt and PCM were replaced trying to solve it w/out success.

Watch the following video......... which also busts a classic or old-school cam degreeing procedure MYTH based solely on cranking compression. IOW.... degreeing the cam based on cranking compression does NOT mean it will provide the best engine performance result.  Don't ...no

<a href="http://sbftech.com/vids/mcmp_0.8.swf?fpFileURL=http://351winsor.com/joel/Shop_Cases/B2300_Timing.FLV&amp;fpPreviewImageURL=http://sbftech.com/vids/SBF_log1.JPG&amp;colorScheme=ff0000&amp;cpBackgroundColor=ffff00&amp;cpHidePanel=mouseout&amp;cpHideDelay=.5&amp;fpButtonSize=63x63" target="_blank">http://sbftech.com/vids/mcmp_0.8.swf?fpFileURL=http://351winsor.com/joel/Shop_Cases/B2300_Timing.FLV&amp;fpPreviewImageURL=http://sbftech.com/vids/SBF_log1.JPG&amp;colorScheme=ff0000&amp;cpBackgroundColor=ffff00&amp;cpHidePanel=mouseout&amp;cpHideDelay=.5&amp;fpButtonSize=63x63</a>

Logged

ACRONYMS:
LUK  LMK  JIC  BTSTDTRT  YCYDYP  NFI-YTM  SPOBI, and the classic... DILLIGAS

'86 Mustang GT, X-303 cam, Holley DP 700, RG Tran., 289 Heads   Ford Smilie 2


Quote from: Joel5.0
The right to be stupid is inalienable for sure however, there is no such thing as a right to impose stupidity onto others
Great Thoughts will Overwhelm a Feeble Mind
There is never money to do it right, but there's always money to do it over.
Knowledge based on external evidence is unreliable.
He, who doesn't ask, does not deserve an answer.
A mind is like a parachute it only works when it is open.  (oldmanjoe)
If you can't explain it simply, you don't understand it well enough. (Albert Einstein)
Tuning on a Dyno for the track, is like swim practice in a bathtub.
I can explain it for you, but I can't understand it for you. (90lxcoupe)
The proof of understanding is the ability to explain it. (H. Torruella)
Ignorance is bliss, but stupidity is orgasmic.
Fraud and falsehood only dread examination. Truth invites it. (Samuel Johnson)
The chaotic resistance of the opponents leads to the conclusion that they are not prepared to meet the challenge. The problem is already much more psychological then technological. [Bojidar Djordjev]
Individuals are rational and humane... Crowds are reactionary and barbaric. (Jason)
The person who says it cannot be done should not interrupt the person doing it. –Chinese Proverb
Nothing sways the stupid more than arguments they can't understand - Cardinal de Retz
Pages: [1] Go Up Print 
« previous next »
Jump to:  



Powered by MySQL Powered by PHP Valid XHTML 1.0! Valid CSS!
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines



408 Stroker